A sebaceous cyst is a lump that forms beneath the skin due to a blockage of the sebaceous (oil) gland. The lump grows slowly under the skin and can range in size from a few millimeters to several centimeters. It is generally harmless and non-cancerous.
What is a subcutaneous sebaceous cyst?
A subcutaneous sebaceous cyst is a lump caused by blockage of a sebaceous gland under the skin. The lump gradually enlarges slowly beneath the skin and can range from a few millimeters to several centimeters. It is generally not dangerous and is not cancerous.
What does a subcutaneous sebaceous cyst look like?
The cyst appears as a lump beneath the skin, soft like a small sac, with a smooth surface. On palpation it can be moved slightly. Inside there is a thick, whitish fluid. It is commonly found on the back, chest, neck, and scalp. If there is no inflammation or the lump is not very large, it usually does not cause pain.
When should you see a doctor?
In general, a subcutaneous sebaceous cyst is not dangerous. However, if any of the following occur, you should see a doctor for proper diagnosis and treatment:
- The lump increases in size rapidly
- There is pain, swelling, redness, warmth, or pus discharge from the lump
- A new cyst appears immediately after one has already been surgically removed
How is a subcutaneous sebaceous cyst treated?
In most cases, small cysts without infection do not require treatment and may shrink on their own. But if the cyst grows large, becomes painful, is located in an area that interferes with movement, or becomes inflamed, treatment may include:
- Taking antibiotics to reduce inflammation or infection, and pain medication if the lump is painful
- Surgical removal of the entire cyst, which is the most effective treatment and helps prevent recurrence at the same site
